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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2020-08-18 15:33:48 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-08-27 08:29:13 -0400 |
| commit | a4eef0711b2cf7a7476c3e2c202a414b68a1baa0 (patch) | |
| tree | faab55d185ae4aff1ce2d2dd9ba31b2b77ee5722 /hw/core | |
| parent | 9445e1e15e66c19e42bea942ba810db28052cd05 (diff) | |
| download | qemu-a4eef0711b2cf7a7476c3e2c202a414b68a1baa0.zip qemu-a4eef0711b2cf7a7476c3e2c202a414b68a1baa0.tar.gz qemu-a4eef0711b2cf7a7476c3e2c202a414b68a1baa0.tar.bz2 | |
vhost-user-blk-pci: default num_queues to -smp N
Automatically size the number of request virtqueues to match the number
of vCPUs. This ensures that completion interrupts are handled on the
same vCPU that submitted the request. No IPI is necessary to complete
an I/O request and performance is improved. The maximum number of MSI-X
vectors and virtqueues limit are respected.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20200818143348.310613-8-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/core')
| -rw-r--r-- | hw/core/machine.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c index 7f65fa8..ea26d61 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -30,6 +30,7 @@ GlobalProperty hw_compat_5_1[] = { { "vhost-scsi", "num_queues", "1"}, + { "vhost-user-blk", "num-queues", "1"}, { "vhost-user-scsi", "num_queues", "1"}, { "virtio-blk-device", "num-queues", "1"}, { "virtio-scsi-device", "num_queues", "1"}, |